The number 64438
64438 is a composite number with 16 divisors. Its prime factorisation is 2 × 11 × 29 × 101. Divisors (16): 1, 2, 11, 22, 29, 58, 101, 202, 319, 638, 1111, 2222, 2929, 5858, 32219, 64438.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
64438 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
64438 is composite. Its prime factorisation is
- 3
The divisors add up to 110160; without 64438 itself that is 45722, so 64438 is deficient (45722 is less than 64438). Euler's totient φ(64438) = 28000 numbers up to 64438 share no factor with it.
- 4
The digits of 64438 add up to 25, and repeating that until one digit is left gives the digital root 7. The Collatz sequence (halve if even, else 3n+1) takes 192 steps to reach 1.
LaTeX source of the formulas on this page
\[ 64438 = 2 \times 11 \times 29 \times 101 \]
64438 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 16 |
| Sum of divisors | 110160 |
| Euler totient φ(n) | 28000 |
| Square | 4152255844 |
| Cube | 267563062075672 |
| Square root | 253.846410 |
| Digit sum / digital root | 25 / 7 |
| Collatz steps to 1 | 192 |
| Scientific notation | 6.4438 × |
64438 in other forms
| Form | Value |
|---|---|
| In words | sixty-four thousand four hundred and thirty-eight |
| Binary (base 2) | 1111101110110110 |
| Octal (base 8) | 175666 |
| Hexadecimal (base 16) | FBB6 |
| Base 3 | 10021101121 |
| As time | 64438 seconds = 17 h 53 min 58 s |
Is 64438 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (64438 ÷ 2 = 32219) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | No (remainder 1) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 2) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 3) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 4) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 3) | A number is divisible by 7 if double the last digit and subtract it from the rest: the result is a multiple of 7. |
| 8 | No (remainder 6) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 7) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 8) | A number is divisible by 10 if the last digit is 0. |
| 11 | Yes (64438 ÷ 11 = 5858) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 10) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 64438 a prime number?
No. 64438 = 2 × 11 × 29 × 101, so it is divisible by 2.
What are the factors of 64438?
1, 2, 11, 22, 29, 58, 101, 202, 319, 638, 1111, 2222, 2929, 5858, 32219, 64438.
What is 64438 in binary?
1111101110110110 (hexadecimal FBB6, octal 175666).
What is the square root of 64438?
About 253.8464.
Is 64438 divisible by 3?
No. Its digits add up to 25, which is not a multiple of 3.
What is special about the number 64438?
It is a composite number with 16 divisors.